5171d409a5
This now provides slightly more functionality than the FreeBSD layer1-newbus interface. It was meant to be a simple change to one header and a few c files, but the change rippled all through various stuff. To prevent a change to the kernel<->userland interface right now the kernel is now lying about card types to userland (but who cares). This will be fixed when the userland interface changes, after layer 3 <-> layer 4 has been fixed. Functional changes: Provide a clean interface for hardware drivers to attach to the upper layers. This will need another small change in the B-channel handling when a similar change to the layer 3 <-> layer 4 interface happens. Avoid passing indices into global arrays of pointers around, instead pass the pointers itself. Don't code hardware driver types by predefined magic numbers (think LKM). Prepare for detachable drivers (think pcmcia). While there remove some sets of function pointers always pointing to the same function (meant to be the configurable set of D channel protocol handlers). It is unlikely another supported D-channel protocol will fit into that (maximal layer interface) abstraction. When we get support for another protocol, we will need to come up with a workable interface. Besides, the old implementation was, uhm, strange.
593 lines
16 KiB
C
593 lines
16 KiB
C
/*
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* Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*---------------------------------------------------------------------------
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*
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* i4b_l2if.c - Layer 3 interface to Layer 2
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* -------------------------------------------
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*
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* $Id: i4b_l2if.c,v 1.2 2001/03/24 12:40:32 martin Exp $
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*
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* $FreeBSD$
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*
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* last edit-date: [Fri Jan 5 11:33:47 2001]
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*
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*---------------------------------------------------------------------------*/
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#ifdef __FreeBSD__
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#include "i4bq931.h"
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#else
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#define NI4BQ931 1
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#endif
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#if NI4BQ931 > 0
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
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#include <sys/callout.h>
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#endif
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#ifdef __FreeBSD__
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#include <machine/i4b_debug.h>
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#include <machine/i4b_ioctl.h>
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#include <machine/i4b_cause.h>
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#else
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#include <netisdn/i4b_debug.h>
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#include <netisdn/i4b_ioctl.h>
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#include <netisdn/i4b_cause.h>
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#endif
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#include <netisdn/i4b_isdnq931.h>
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#include <netisdn/i4b_l3l4.h>
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#include <netisdn/i4b_mbuf.h>
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#include <netisdn/i4b_l1l2.h>
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#include <netisdn/i4b_l2.h>
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#include <netisdn/i4b_l3.h>
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#include <netisdn/i4b_l3fsm.h>
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#include <netisdn/i4b_q931.h>
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#include <netisdn/i4b_l4.h>
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static unsigned char make_q931_cause(cause_t cause);
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/*---------------------------------------------------------------------------*
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* this converts our internal state (number) to the number specified
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* in Q.931 and is used for reporting our state in STATUS messages.
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*---------------------------------------------------------------------------*/
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int i4b_status_tab[] = {
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0, /* ST_U0, */
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1, /* ST_U1, */
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3, /* ST_U3, */
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4, /* ST_U4, */
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6, /* ST_U6, */
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7, /* ST_U7, */
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8, /* ST_U8, */
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9, /* ST_U9, */
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10, /* ST_U10, */
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11, /* ST_U11, */
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12, /* ST_U12, */
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19, /* ST_U19, */
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6, /* ST_IWA, */
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6, /* ST_IWR, */
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1, /* ST_OW, */
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6, /* ST_IWL, */
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};
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/*---------------------------------------------------------------------------*
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* return a valid q.931/q.850 cause from any of the internal causes
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*---------------------------------------------------------------------------*/
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static unsigned char
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make_q931_cause(cause_t cause)
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{
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register unsigned char ret;
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switch(GET_CAUSE_TYPE(cause))
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{
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case CAUSET_Q850:
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ret = GET_CAUSE_VAL(cause);
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break;
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case CAUSET_I4B:
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ret = cause_tab_q931[GET_CAUSE_VAL(cause)];
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break;
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default:
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panic("make_q931_cause: unknown cause type!");
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break;
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}
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ret |= EXT_LAST;
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return(ret);
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}
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/*---------------------------------------------------------------------------*
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* return status of data link
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*---------------------------------------------------------------------------*/
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int
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i4b_get_dl_stat(call_desc_t *cd)
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{
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return(ctrl_desc[cd->bri].dl_est);
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}
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/*---------------------------------------------------------------------------*
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* DL ESTABLISH INDICATION from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_establish_ind(int bri)
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{
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int i, found;
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NDBGL2(L2_PRIM, "DL-ESTABLISH-IND bri %d", bri);
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/* first set DL up in controller descriptor */
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NDBGL3(L3_MSG, "unit=%d DL established!", bri);
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ctrl_desc[bri].dl_est = DL_UP;
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found = 0;
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/* second, inform all (!) active call of the event */
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for(i=0; i < N_CALL_DESC; i++)
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{
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if( (call_desc[i].cdid != 0) && call_desc[i].bri == bri) {
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next_l3state(&call_desc[i], EV_DLESTIN);
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found++;
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}
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}
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if(found == 0)
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{
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NDBGL3(L3_ERR, "ERROR, no cdid for bri %d found!", bri);
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return(-1);
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}
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else
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{
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return(0);
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}
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}
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/*---------------------------------------------------------------------------*
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* DL ESTABLISH CONFIRM from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_establish_cnf(int bri)
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{
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int i;
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int found = 0;
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NDBGL2(L2_PRIM, "DL-ESTABLISH-CONF bri %d", bri);
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for(i=0; i < N_CALL_DESC; i++)
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{
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if(call_desc[i].cdid != 0 && call_desc[i].bri == bri) {
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ctrl_desc[bri].dl_est = DL_UP;
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next_l3state(&call_desc[i], EV_DLESTCF);
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found++;
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}
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}
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if(found == 0)
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{
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NDBGL3(L3_ERR, "ERROR, no cdid for bri %d found!", bri);
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return(-1);
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}
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else
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{
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return(0);
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}
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}
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/*---------------------------------------------------------------------------*
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* DL RELEASE INDICATION from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_release_ind(int bri)
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{
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int i;
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int found = 0;
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NDBGL2(L2_PRIM, "DL-RELEASE-IND bri %d", bri);
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/* first set controller to down */
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ctrl_desc[bri].dl_est = DL_DOWN;
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found = 0;
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/* second, inform all (!) active calls of the event */
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for(i=0; i < N_CALL_DESC; i++)
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{
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if(call_desc[i].cdid != 0 && call_desc[i].bri == bri) {
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next_l3state(&call_desc[i], EV_DLRELIN);
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found++;
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}
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}
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if(found == 0)
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{
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/* this is not an error since it might be a normal call end */
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NDBGL3(L3_MSG, "no cdid for bri %d found", bri);
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}
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* DL RELEASE CONFIRM from Layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_release_cnf(int bri)
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{
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NDBGL2(L2_PRIM, "DL-RELEASE-CONF unit %d", bri);
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ctrl_desc[bri].dl_est = DL_DOWN;
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* i4b_dl_data_ind - process a rx'd I-frame got from layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_data_ind(int bri, struct mbuf *m)
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{
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i4b_decode_q931(bri, m->m_len, m->m_data);
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i4b_Dfreembuf(m);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* dl_unit_data_ind - process a rx'd U-frame got from layer 2
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*---------------------------------------------------------------------------*/
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int
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i4b_dl_unit_data_ind(int bri, struct mbuf *m)
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{
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i4b_decode_q931(bri, m->m_len, m->m_data);
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i4b_Dfreembuf(m);
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return(0);
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}
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/*---------------------------------------------------------------------------*
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* send CONNECT message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_connect(call_desc_t *cd)
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{
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struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
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struct mbuf *m;
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u_char *ptr;
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NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_CONNECT_LEN)) == NULL)
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panic("i4b_l3_tx_connect: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call reference length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = CONNECT; /* message type = connect */
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i4b_dl_data_req(l2sc, m);
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}
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/*---------------------------------------------------------------------------*
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* send RELEASE COMPLETE message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_release_complete(call_desc_t *cd, int send_cause_flag)
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{
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struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
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struct mbuf *m;
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u_char *ptr;
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int len = I_FRAME_HDRLEN + MSG_RELEASE_COMPLETE_LEN;
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if(send_cause_flag == 0)
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{
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len -= 4;
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NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x",
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cd->bri, cd->cr);
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}
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else
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{
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NDBGL3(L3_PRIM, "bri=%d, cr=0x%02x, cause=0x%x",
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cd->bri, cd->cr, cd->cause_out);
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}
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if((m = i4b_Dgetmbuf(len)) == NULL)
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panic("i4b_l3_tx_release_complete: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call reference length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = RELEASE_COMPLETE; /* message type = release complete */
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if(send_cause_flag)
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{
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*ptr++ = IEI_CAUSE; /* cause ie */
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*ptr++ = CAUSE_LEN;
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*ptr++ = CAUSE_STD_LOC_OUT;
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*ptr++ = make_q931_cause(cd->cause_out);
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}
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i4b_dl_data_req(l2sc, m);
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}
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/*---------------------------------------------------------------------------*
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* send DISCONNECT message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_disconnect(call_desc_t *cd)
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{
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struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
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struct mbuf *m;
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u_char *ptr;
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NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_DISCONNECT_LEN)) == NULL)
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panic("i4b_l3_tx_disconnect: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call ref length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = DISCONNECT; /* message type = disconnect */
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*ptr++ = IEI_CAUSE; /* cause ie */
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*ptr++ = CAUSE_LEN;
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*ptr++ = CAUSE_STD_LOC_OUT;
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*ptr++ = make_q931_cause(cd->cause_out);
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i4b_dl_data_req(l2sc, m);
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}
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/*---------------------------------------------------------------------------*
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* send SETUP message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_setup(call_desc_t *cd)
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{
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struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
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struct mbuf *m;
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u_char *ptr;
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int slen = strlen(cd->src_telno);
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int dlen = strlen(cd->dst_telno);
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/*
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* there is one additional octet if cd->bprot == BPROT_NONE
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* NOTE: the selection of a bearer capability by a B L1
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* protocol is highly questionable and a better
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* mechanism should be used in future. (-hm)
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*/
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NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_SETUP_LEN + slen + dlen +
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(cd->bprot == BPROT_NONE ? 1 : 0))) == NULL)
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{
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panic("i4b_l3_tx_setup: can't allocate mbuf\n");
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}
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cd->crflag = CRF_ORIG; /* we are the originating side */
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ptr = m->m_data + I_FRAME_HDRLEN;
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*ptr++ = PD_Q931; /* protocol discriminator */
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*ptr++ = 0x01; /* call ref length */
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*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
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*ptr++ = SETUP; /* message type = setup */
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*ptr++ = IEI_SENDCOMPL; /* sending complete */
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*ptr++ = IEI_BEARERCAP; /* bearer capability */
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/* XXX
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* currently i have no idea if this should be switched by
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* the choosen B channel protocol or if there should be a
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* separate configuration item for the bearer capability.
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* For now, it is switched by the choosen b protocol (-hm)
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*/
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switch(cd->bprot)
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{
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case BPROT_NONE: /* telephony */
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*ptr++ = IEI_BEARERCAP_LEN+1;
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*ptr++ = IT_CAP_SPEECH;
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*ptr++ = IT_RATE_64K;
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*ptr++ = IT_UL1_G711A;
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break;
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case BPROT_RHDLC: /* raw HDLC */
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*ptr++ = IEI_BEARERCAP_LEN;
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*ptr++ = IT_CAP_UNR_DIG_INFO;
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*ptr++ = IT_RATE_64K;
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break;
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default:
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*ptr++ = IEI_BEARERCAP_LEN;
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*ptr++ = IT_CAP_UNR_DIG_INFO;
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*ptr++ = IT_RATE_64K;
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break;
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}
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*ptr++ = IEI_CHANNELID; /* channel id */
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*ptr++ = IEI_CHANNELID_LEN; /* channel id length */
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switch(cd->channelid)
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{
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case CHAN_B1:
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*ptr++ = CHANNELID_B1;
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break;
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case CHAN_B2:
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*ptr++ = CHANNELID_B2;
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break;
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default:
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*ptr++ = CHANNELID_ANY;
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break;
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}
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*ptr++ = IEI_CALLINGPN; /* calling party no */
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*ptr++ = IEI_CALLINGPN_LEN+slen;/* calling party no length */
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*ptr++ = NUMBER_TYPEPLAN; /* type of number, number plan id */
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strncpy(ptr, cd->src_telno, slen);
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ptr += slen;
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*ptr++ = IEI_CALLEDPN; /* called party no */
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*ptr++ = IEI_CALLEDPN_LEN+dlen; /* called party no length */
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*ptr++ = NUMBER_TYPEPLAN; /* type of number, number plan id */
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strncpy(ptr, cd->dst_telno, dlen);
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ptr += dlen;
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i4b_dl_data_req(l2sc, m);
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}
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/*---------------------------------------------------------------------------*
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* send CONNECT ACKNOWLEDGE message
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*---------------------------------------------------------------------------*/
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void
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i4b_l3_tx_connect_ack(call_desc_t *cd)
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{
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struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
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struct mbuf *m;
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u_char *ptr;
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NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
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if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_CONNECT_ACK_LEN)) == NULL)
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panic("i4b_l3_tx_connect_ack: can't allocate mbuf\n");
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ptr = m->m_data + I_FRAME_HDRLEN;
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|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = CONNECT_ACKNOWLEDGE; /* message type = connect ack */
|
|
|
|
i4b_dl_data_req(l2sc, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send STATUS message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_status(call_desc_t *cd, u_char q850cause)
|
|
{
|
|
struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
|
|
NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
|
|
|
|
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_STATUS_LEN)) == NULL)
|
|
panic("i4b_l3_tx_status: can't allocate mbuf\n");
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = STATUS; /* message type = connect ack */
|
|
|
|
*ptr++ = IEI_CAUSE; /* cause ie */
|
|
*ptr++ = CAUSE_LEN;
|
|
*ptr++ = CAUSE_STD_LOC_OUT;
|
|
*ptr++ = q850cause | EXT_LAST;
|
|
|
|
*ptr++ = IEI_CALLSTATE; /* call state ie */
|
|
*ptr++ = CALLSTATE_LEN;
|
|
*ptr++ = i4b_status_tab[cd->Q931state];
|
|
|
|
i4b_dl_data_req(l2sc, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send RELEASE message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_release(call_desc_t *cd, int send_cause_flag)
|
|
{
|
|
struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
int len = I_FRAME_HDRLEN + MSG_RELEASE_LEN;
|
|
|
|
NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
|
|
|
|
if(send_cause_flag == 0)
|
|
len -= 4;
|
|
|
|
if((m = i4b_Dgetmbuf(len)) == NULL)
|
|
panic("i4b_l3_tx_release: can't allocate mbuf\n");
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = RELEASE; /* message type = release complete */
|
|
|
|
if(send_cause_flag)
|
|
{
|
|
*ptr++ = IEI_CAUSE; /* cause ie */
|
|
*ptr++ = CAUSE_LEN;
|
|
*ptr++ = CAUSE_STD_LOC_OUT;
|
|
*ptr++ = make_q931_cause(cd->cause_out);
|
|
}
|
|
|
|
i4b_dl_data_req(l2sc, m);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*
|
|
* send ALERTING message
|
|
*---------------------------------------------------------------------------*/
|
|
void
|
|
i4b_l3_tx_alert(call_desc_t *cd)
|
|
{
|
|
struct l2_softc *l2sc = (struct l2_softc*)isdn_find_l2_by_bri(cd->bri);
|
|
struct mbuf *m;
|
|
u_char *ptr;
|
|
|
|
if((m = i4b_Dgetmbuf(I_FRAME_HDRLEN + MSG_ALERT_LEN)) == NULL)
|
|
panic("i4b_l3_tx_alert: can't allocate mbuf\n");
|
|
|
|
NDBGL3(L3_PRIM, "bri %d, cr = 0x%02x", cd->bri, cd->cr);
|
|
|
|
ptr = m->m_data + I_FRAME_HDRLEN;
|
|
|
|
*ptr++ = PD_Q931; /* protocol discriminator */
|
|
*ptr++ = 0x01; /* call reference length */
|
|
*ptr++ = setup_cr(cd, cd->cr); /* call reference value */
|
|
*ptr++ = ALERT; /* message type = alert */
|
|
|
|
i4b_dl_data_req(l2sc, m);
|
|
}
|
|
|
|
#endif /* NI4BQ931 > 0 */
|